BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 8335 Comm: syz-executor Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 add_chain_cache kernel/locking/lockdep.c:-1 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 do_write_seqcount_begin_nested include/linux/seqlock.h:477 [inline] do_write_seqcount_begin include/linux/seqlock.h:503 [inline] psi_write_begin+0x1b0/0x320 kernel/sched/psi.c:183 psi_task_change+0xd8/0x318 kernel/sched/psi.c:919 psi_enqueue kernel/sched/stats.h:166 [inline] enqueue_task+0x250/0x2f4 kernel/sched/core.c:2092 activate_task kernel/sched/core.c:2132 [inline] ttwu_do_activate+0x1a4/0x764 kernel/sched/core.c:3741 ttwu_queue kernel/sched/core.c:4004 [inline] try_to_wake_up+0x4c4/0xe24 kernel/sched/core.c:4328 wake_up_process+0x18/0x24 kernel/sched/core.c:4459 kick_pool+0x3e0/0x58c kernel/workqueue.c:1283 __queue_work+0xdbc/0x1210 kernel/workqueue.c:2340 queue_work_on+0xdc/0x18c kernel/workqueue.c:2390 queue_work include/linux/workqueue.h:669 [inline] schedule_work include/linux/workqueue.h:730 [inline] nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:-1 [inline] nsim_fib_event_nb+0xa9c/0xdc8 drivers/net/netdevsim/fib.c:1043 notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85 atomic_notifier_call_chain+0xd0/0x180 kernel/notifier.c:223 call_fib_notifiers+0x44/0x74 net/core/fib_notifier.c:35 call_fib6_notifiers+0x50/0x80 net/ipv6/fib6_notifier.c:22 fib6_del_route net/ipv6/ip6_fib.c:-1 [inline] fib6_del+0xcec/0x11e4 net/ipv6/ip6_fib.c:2087 fib6_clean_node+0x224/0x49c net/ipv6/ip6_fib.c:2249 fib6_walk_continue+0x654/0x878 net/ipv6/ip6_fib.c:2171 fib6_walk+0x140/0x254 net/ipv6/ip6_fib.c:2219 fib6_clean_tree net/ipv6/ip6_fib.c:2299 [inline] __fib6_clean_all+0x1dc/0x310 net/ipv6/ip6_fib.c:2315 fib6_clean_all+0x3c/0x50 net/ipv6/ip6_fib.c:2326 rt6_sync_down_dev net/ipv6/route.c:5005 [inline] rt6_disable_ip+0x104/0x6cc net/ipv6/route.c:5010 addrconf_ifdown+0x148/0x148c net/ipv6/addrconf.c:3853 addrconf_notify+0x2f4/0xcdc net/ipv6/addrconf.c:-1 notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:2229 [inline] call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers net/core/dev.c:2281 [inline] netif_close_many+0x2d4/0x448 net/core/dev.c:1784 unregister_netdevice_many_notify+0x4a8/0x1de0 net/core/dev.c:12110 unregister_netdevice_many net/core/dev.c:12211 [inline] unregister_netdevice_queue+0x2b4/0x300 net/core/dev.c:12055 unregister_netdevice include/linux/netdevice.h:3382 [inline] nsim_destroy+0x1c0/0x5f8 drivers/net/netdevsim/netdev.c:1136 __nsim_dev_port_del+0x13c/0x19c drivers/net/netdevsim/dev.c:1473 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1485 [inline] nsim_dev_reload_destroy+0x240/0x43c drivers/net/netdevsim/dev.c:1707 nsim_drv_remove+0x5c/0x154 drivers/net/netdevsim/dev.c:1722 nsim_bus_remove+0x20/0x30 drivers/net/netdevsim/bus.c:419 device_remove drivers/base/dd.c:569 [inline] __device_release_driver drivers/base/dd.c:1274 [inline] device_release_driver_internal+0x3a8/0x68c drivers/base/dd.c:1297 device_release_driver+0x28/0x38 drivers/base/dd.c:1320 bus_remove_device+0x310/0x3b0 drivers/base/bus.c:579 device_del+0x47c/0x808 drivers/base/core.c:3878 device_unregister+0x2c/0xcc drivers/base/core.c:3919 nsim_bus_dev_del drivers/net/netdevsim/bus.c:483 [inline] del_device_store+0x27c/0x31c drivers/net/netdevsim/bus.c:244 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0x1a8/0x23c fs/sysfs/file.c:145 kernfs_fop_write_iter+0x314/0x488 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x540/0xa3c fs/read_write.c:686 ksys_write+0x120/0x210 fs/read_write.c:738 __do_sys_write fs/read_write.c:749 [inline] __se_sys_write fs/read_write.c:746 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:746 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 netdevsim netdevsim5 netdevsim0: renamed from eth0 netdevsim netdevsim5 netdevsim1: renamed from eth1 netdevsim netdevsim5 netdevsim2: renamed from eth2 netdevsim netdevsim5 netdevsim3: renamed from eth3 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device batadv0 veth0_vlan: entered promiscuous mode veth1_vlan: entered promiscuous mode veth0_macvtap: entered promiscuous mode veth1_macvtap: entered promiscuous mode batman_adv: batadv0: Interface activated: batadv_slave_0 batman_adv: batadv0: Interface activated: batadv_slave_1 ieee80211 phy31: Selected rate control algorithm 'minstrel_ht' ieee80211 phy32: Selected rate control algorithm 'minstrel_ht'